With a $36 million opening day, “Days of Future Past” could reach $110 million over the long Memorial Day weekend, while Sandler and Drew Barrymore’s comedy may have trouble hitting $18 million.

Bryan Singer‘s critically acclaimed X-Men: Days of Future Past did impressive business at the Friday box office, pulling in $36 million at 3,996 theaters. That puts it on course for a $100 million-plus debut. But the new Adam Sandler comedy, Blended, which Warners is releasing, stumbled out of the gate, grossing $4.4 million on Friday and will struggle to get into the high-teen millions over the holiday weekend.

Days of Future Past, the 20th Century Fox tentpole, earned a CinemaScore of A and will easily own the long Memorial Day weekend, as it aims for about $110 million, with the most bullish box office observers believing it has a shot at hitting $115 million to $120 million. Days‘ opening day gross, which included $8.1 million from midnight screenings, was better than that of every other X-Men entry, save for 2006’s X-Men: The Last Stand, which opened to $45.1 million.

Singer, who directed the first two X-Men films, withdrew from promoting Days of Future Past after a sex abuse lawsuit was filed against him.

Blended, the other new nationwide offering in North America, reteams Sandler with Drew Barrymore. While the comedy about two single parents who meet while on an African safari with their kids got a critical drubbing, audiences were more forgiving, awarding it an A- CinemaScore. But with an opening day gross of just $4.4 million, the movie arrived in third place and may have trouble reaching $17 million to $18 million over the four-day holiday. That’s a major blow for Sandler and Warners, although the film cost a relatively modest $45 million to make.

The four-day total would make it amongst Sandler’s lowest openings of the past five years, only topping That’s My Boy‘s $13.5 million three-day opening two years ago (even though, Blended‘s three-day take may be on par with That’s My Boy). His previous box office outing, last July’s Grown Ups 2, opened to $42.5 million domestically over three days.

Days of Future Past is taking a big bite out of Warner/Legendary’s Godzilla, which ranked second for the day with a Friday gross of $8.8 million, down a steep 77 percent from its opening Friday of $38.4 million a week earlier. The monster movie opened No. 1 last weekend with a huge $93.2 million. It’s looking at a $40 million four-day number.

Claiming fourth place for the day was Universal’s Neighbors, the comedy starring Seth Rogen and Zac Efron. Entering its third weekend, it crossed the $100 million mark as it took in $4.2 million.

Sony’s The Amazing Spider-Man 2, beginning its fourth weekend, ranked fifth, taking in $2 million. It expects to collect just under $10 million for the holiday, which would put its domestic tally at just about $187 million. The movie began the weekend with a worldwide purse of $650 million.